Remove one suppression

src/Compilers/Core/Portable/Collections/SmallConcurrentSetOfInts.cs

@@ -53,18 +53,19 @@ public bool Contains(int i)
 
         private static bool Contains(SmallConcurrentSetOfInts set, int i)
         {
+            SmallConcurrentSetOfInts? current = set;
             do
             {
                 // PERF: Not testing for unoccupied slots since it adds complexity. The extra comparisons
                 // would slow down this inner loop such that any benefit of an 'early out' would be lost.
-                if (set._v1 == i || set._v2 == i || set._v3 == i || set._v4 == i)
+                if (current._v1 == i || current._v2 == i || current._v3 == i || current._v4 == i)
                 {
                     return true;
                 }
 
-                set = set._next!;
+                current = current._next;
             }
-            while (set != null);
+            while (current != null);
 
             return false;
         }

src/Dependencies/PooledObjects/ObjectPool`1.cs

@@ -24,7 +24,6 @@ namespace Microsoft.CodeAnalysis.PooledObjects
     internal delegate TReturn Func<TArg, TReturn>(TArg arg);
 #endif
 
-
     /// <summary>
     /// Generic implementation of object pooling pattern with predefined pool size limit. The main
     /// purpose is that limited number of frequently used objects can be kept in the pool for